I would second what you said about
Eponine,
Cosette, Javert, Marie-Antoinette, and the likes. These are not names that French people use at all and sound more like someone read
Victor Hugo once and was smitten. LOL
As for
Chloé and
Léo... I understand if someone in the US just adds an accent in order to sound fancier, it seems odd. But if the person is of French origin, these are the actual spellings. So I guess it depends.
Don't hesitate to rate my different PNLs:
http://www.behindthename.com/pnl/246179